36c5a33923a20f5ae4f91ce751c4263791d271c6e1d3675f9e6f97155334594b

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
11/08/2024, 17:12

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General

Target

ReplaceIAT.dll
Size

98KB
MD5

b4605ce87bb8706ab4d6117581944d6a
SHA1

8de7743b4901b48154a6457e02fc7d8b3905b79b
SHA256

30f390ba154521c67fec87486a2a82e6240a0eb24223a9009115cf5098fcb7d9
SHA512

d25c8374175b906f28269e49881361a260e7a2a094a225a6209c5ea51d6383958430ee47db3d3be2bc9b23e757332f02021b6ffc75155e619dbc4d5bf1606d1b
SSDEEP

3072:atA5jWDxMLRd4liaO9TfvxtaaHBZDfta:atA5jWs8l09jvPZB

Score

7^/10

discovery

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
2380	rundll32.exe
2380	rundll32.exe
2380	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ws.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ws.dll	rundll32.exe
File created	C:\Windows\SysWOW64\wskernal.dll	rundll32.exe
File created	C:\Windows\SysWOW64\wsGdi.dll	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30
PID 1984 wrote to memory of 2380	1984	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ReplaceIAT.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ReplaceIAT.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\ws.dll

Filesize
202KB

MD5
7ff15a4f092cd4a96055ba69f903e3e9

SHA1
a3d338a38c2b92f95129814973f59446668402a8

SHA256
1b594e6d057c632abb3a8cf838157369024bd6b9f515ca8e774b22fe71a11627

SHA512
4b015d011c14c7e10568c09bf81894681535efb7d76c3ef9071fffb3837f62b36e695187b2d32581a30f07e79971054e231a2ca4e8ad7f0f83d5876f8c086dae

Download Submit
\Windows\SysWOW64\wsGdi.dll

Filesize
304KB

MD5
d6d3ad7bf1d6f6ce9547613ed5e170a2

SHA1
6a20fe18619dc46e379c42f12ed761749053cbf9

SHA256
ea3bd7fec193a8cfe1d5736301acadc476fb6aac5475a45776d0a638e9845445

SHA512
2b900118d582eb8bba1612c67909bda97b2cd8755a00de1135c2809ab65385523a2f1c74eff7b37fc4ada585decfab2febbab9247d46038787a9ac786747c222

Download Submit
\Windows\SysWOW64\wskernal.dll

Filesize
1.1MB

MD5
9b98d47916ead4f69ef51b56b0c2323c

SHA1
290a80b4ded0efc0fd00816f373fcea81a521330

SHA256
96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b

SHA512
68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94

Download Submit
memory/2380-1-0x0000000010000000-0x0000000010042000-memory.dmp

Filesize
264KB

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